Bayern Munich star Robert Lewandowski believes the arrival of Philippe Coutinho has made the German giants "unpredictable" this season.

New signing Coutinho made his debut last weekend as Lewandowski's hat-trick helped Bayern Munich ease to a 3-0 win at Schalke - their first victory of the new Bundesliga season.

The Brazilian superstar joined Bayern last week on a season-long loan from Barcelona , with the Bundesliga champions then having the option to buy the 27-year-old for £109.8million.

The Brazil playmaker's arrival should help cover the loss of Arjen Robben, Franck Ribery and James Rodriguez, who all left the Bavarian giants this summer, but a lack of match fitness meant he started that win on the bench.

But his new team-mate is confident that he will prove an influential member of the squad and has no doubt that he'll help them secure trophies this season.

"His last pass is insanity. He can be the key in important games, especially in the Champions League, and the special something," Lewandowski told Bild .

"We become more unpredictable through him, that makes us more dangerous. He can play on the ten, left outside, if necessary also on the right. We can play with one or two six, with tens or two aft. We have more options now."